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TDA9829T Scheda tecnica(PDF) 8 Page - NXP Semiconductors

Il numero della parte TDA9829T
Spiegazioni elettronici  Downconverter for DVB
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Produttore elettronici  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA9829T Scheda tecnica(HTML) 8 Page - NXP Semiconductors

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1998 Nov 09
8
Philips Semiconductors
Product specification
Downconverter for DVB
TDA9829T
Notes
1. Performance may be decreased at VP = 4.5 V.
2. This parameter is not tested during production and is only given as application information for designing the television
receiver.
3. Mute state also can be achieved by leaving pin 20 open-circuit.
4. Resonance circuit of VCO: Q0 > 50; Cext, Cint and L see Table 2.
5. Temperature coefficient of external LC-circuit is equal to zero.
6. Response speed valid for an IF input level range of 200
µVupto70mV.
7. To match the AFC output signal to different tuning systems a current source output is provided. The test circuit is
given in Fig.4. The AFC steepness can be changed by the resistors at pin 14.
8. Depending on the ratio
∆C/C0 of the LC resonant circuit of VCO (Q0 > 50; C0 =Cint +Cext; see Table 2).
Table 1
Input frequencies, symbol frequencies and VCO frequencies
∆G
IF
IF slip by automatic gain control
tuner gain current from
20 to 80%
68dB
AFC circuit (pin 14); see notes 7 and 8 and Fig.4
CRstps(US)
control steepness
∆I14/∆fIF for
USA
fIF = 43.75 MHz
0.7
0.98
1.3
µA/kHz
CRstps(EU)
control steepness
∆I14/∆fIF for
Europe
fIF = 36.15 MHz
0.45
0.70
0.95
µA/kHz
DVB output signal (IF input to DVB output)
Vo(p-p)
output voltage (pin 11)
(peak-to-peak value)
CL < 15 pF; RL >5kΩ; with
internal AGC
1.8
2.1
2.4
V
VO(DC)
DC output voltage
2.5
V
B−1dB
−1 dB bandwidth
CL < 15 pF; RL >5kΩ
11
12
MHz
B−3dB
−3 dB bandwidth
17
MHz
αC(DVB)
fundamental input signal and
IF harmonics
35
40
dB
α
H
suppression of in-band
harmonics
Vo = 2.0 V (p-p)
30
35
dB
PSRR
power supply ripple rejection at
pin 11
see Fig.5
26
36
dB
SYMBOL
DESCRIPTION
DVB (Europe)
DVB (USA)
UNIT
fs
Symbol frequency
6.9
5.0
MHz
fIF
IF frequency
36.15
43.75
MHz
fVCO
VCO frequency
86.0
97.5
MHz
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT


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